Finally a answer to Hybrid lighting AquaticLife allow both T5 and LED in the one unit.
Hybrid Mounting Kit
Aquatic Life T5 HO Hybrid 4-Lamp Mounting System Fixtures
Aquatic Life T5 HO Hybrid 4-Lamp Mounting System Fixtures, Black.
Available in 24", 36", 48" & 61" lengths for 18-24" wide (front to back) aquariums.
Universal mounts included for AI Hydra & AI Prime (TM) LED Fixtures. *Optional EcoTech Radion (TM), Kessil 360 (TM) Mounts.
This new mounting system with T5 HO lamp housings is for use with the Kessil 360, EcoTech Radion and AquaIllumination Prime LED fixtures, and includes universal mounting brackets to install them into the fixture.
Suspension hardware included - lamps, mounting arms and LED fixtures NOT included.
Features: HEP (TM) Brand ballasts drive all T5 HO lamps, including popular ATI (TM) and Giesemann (TM); Silicone socket lamp endcaps protect pins of T5 HO lamps from moisture and salt creep;